onCancel property

(FutureOr<void> Function?()?) onCancel

read / write

The callback which is called when the stream is canceled.

May be set to null, in which case no callback will happen.

Implementation

abstract FutureOr<void> Function()? onCancel;

© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.18.5/dart-async/StreamController/onCancel.html